package org.apache.axis2.tool.core;

import org.apache.axis2.wsdl.codegen.writer.ClassWriter;
import org.apache.axis2.wsdl.codegen.writer.ServiceXMLWriter;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

public class ServiceFileCreator {
    
    public File createServiceFile(String serviceName,String implementationClassName,ArrayList methodList) throws Exception {
        
        String currentUserDir = System.getProperty("user.dir");
        String fileName = "services.xml";
        
        ClassWriter serviceXmlWriter = new ServiceXMLWriter(currentUserDir);
        writeClass(getServiceModel(serviceName,implementationClassName,methodList),serviceXmlWriter,fileName);

        return new File(currentUserDir + File.separator + fileName);


    }

    private Document getServiceModel(String serviceName,String className,ArrayList methods){

        DocumentBuilder builder = null;
        try {
            builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            throw new RuntimeException(e);
        }
        Document doc = builder.newDocument();
        
        Element rootElement = doc.createElement("interface");
        rootElement.setAttribute("classpackage","");
        rootElement.setAttribute("name",className);
        rootElement.setAttribute("servicename",serviceName);
        Element methodElement = null;
        int size = methods.size();
        for(int i=0;i<size;i++){
            methodElement = doc.createElement("method");
            rootElement.setAttribute("name",methods.get(i).toString());
            rootElement.appendChild(methodElement);
        }
        doc.appendChild(rootElement);
        return doc;
    }
    
    /**
     * A resusable method for the implementation of interface and implementation writing
     * @param model
     * @param writer
     * @throws IOException
     * @throws Exception
     */
    private void writeClass(Document model, ClassWriter writer,String fileName) throws IOException,Exception {
        
        Source source = new DOMSource(model);
        ByteArrayOutputStream memoryStream = new ByteArrayOutputStream();
        Result result = new StreamResult(memoryStream);
        Transformer xformer = TransformerFactory.newInstance().newTransformer();
        xformer.transform(source, result);
        
        //TODO: Doesn't really output stuff from the memorystream to file...hmm.
        
        writer.loadTemplate();
        writer.createOutFile(null,
                 fileName);
    }
    
   
}